At USB Phone World, we have Apple M8511s replacement batteries for Apple PowerBook G4 15-inch computers. Our replacement computer batteries offer the same high-caliber performance as the original batteries supplied by the manufacturer, at everyday low prices. The Apple M8511s battery is a 14.8 volt Li-ion (lithium-ion) battery with 4400mAh maximum storage capacity and extra-long standby (sleep) capability. We offer our Apple M8511s batteries as low-cost, high-quality replacements for the original Apple laptop battery. You can count on these batteries to keep your system operating at its very best. When purchasing Apple laptop battery replacements, it is important to order the correct model for your computer, as different models use different batteries. If you have any questions or concerns about the compatibility of a particular Apple laptop battery with your system, one of our customer representatives will be happy to guide you through the ordering process.
If you're planning a business trip or out in the field away from electrical power, it is very important to have a spare battery on hand. The average life of a laptop battery can be anywhere from 1 to 6 hours. This particular model, the Apple M8511s, will typically last from 3-4 hours. Several different variables can affect the battery life. Apart from the type, age and capacity of the battery, it is dependent upon the application that is being used. Multimedia activities are very draining on a battery (computer games, DVD movies and music). To save power, turn off Wi-Fi and Bluetooth when not in use, and disconnect any external devices. Dimming the screen brightness will also save battery power, as will adjusting power options and turning off auto-save and scheduled tasks.

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